Bio 209 Practical 1

What is the Shannon diversity index value for the following data? Species # A 2 B 25 C 12 D 1 E 7

1

A country with higher death rates than birth rates is in stage ___ of the demographic transition model?

2

This country is most likely in demographic transition stage?

3

You conduct a mark-recapture study of snails by marking 40 snails with spots of paint on their shells. You recapture a total of 120 snails; 15 of these have marks. What is the estimated population size using the Lincoln-Petersen method?

320

Which of the following best describes a "Keystone Species"?

A species whose removal would have a major effect on the ecosystem

Another term for an age structure diagram is?

Age-class histogram

A population is?

All the members of one species in a given area

Which of the following is true about stage 4 of the demographic transition model?

Both birth and death rates are low, essentially leveled off

The age structure diagram here is most similar to that of?

Democratic Republic of Congo

Population size changes based on?

Fertility, mortality and migration

Which of the following is an example of a density-independent limiting factor?

Flooding (natural disaster)

Some biologists consider us to be in the midst of the ____ mass extinction?

Holocene

An essay on the Principle of Population, suggesting dire consequences for human population growth, was written by?

Malthus

Which of the following is NOT an assumption of the Lincoln-Peterson mark-recapture method?

Marks stay visible

Which of the following is NOT a factor that usually lowers birth rates?

a more industry-based economy

The study of human population is?

demography

A community containing only 12 members of species "A" and 1000 members of species "B" has?

high evenness and high richness

If some marked animals within a population lose their marks before recapture, population size will be?

overestimated

A population limited by limits to its food supply is an example of?

top down regulation

You want to measure salt marsh diversity using the Shannon diversity index. You use many 1 m square quadrats, placing them in areas of the salt marsh where tall cordgrass with not get in the way, and counting how many species and members of each species you find within each quadrant. What is wrong with this approach?

you have not measured evenness

Biomes are primarily deterimined by?

Temperature and precipitation

The idea that shared, unregulated resources will be degraded by increasing populations overusing them is referred to as?

The tragedy of commons

Which of the following is true about Stage 2 of the demographic transition model?

There is a steep decline in death rate; birth rate remains high

"Meeting the needs of the present without compromising the ability of future generations to meet their own needs" is one way to describe?

Sustainable development

Which of the following statements about richness is true?

Richness is the same as diversity